Q. A single main breaker is installed, then taps supply individual meters with disconnecting means for individual tenants. Should a main bonding jumper be installed at the single main breaker or at each separate disconnect?
Q. When a conduit leaves a Class I, Division 1 classified paint spray room and goes under the concrete floor into a cabinet in the motor control room that is non-classified, is one sealing fitting in the paint mix room sufficient, or is an additional sealing fitting required in the non-classified area as well?
310.15 Conductor Ampacity (A) General Requirements The ampacity of a conductor can be determined either by using the tables in accordance with 310.15(b), or under engineering supervision as provided in 310.15(C). FPN No. 1: Ampacities provided by this ...
Q. A conductor passing through a box unbroken counts as one conductor, so if I loop a conductor through the box unbroken and strip off enough insulation to terminate on a receptacle without cutting the wire, does the conductor count as one or two conductors for box sizing?
Facility Managers Turn to Smart Meters to Comply with LEED v4
With the introduction of LEED v4, facility managers face tougher metering requirements. In response, they are turning to advanced energy "smart meters" to easily access more granular energy data when measuring and verifying their building's energy consumption....More
Testing for earth ground resistance is essential for two important reasons: safety and equipment uptime. Without an effective grounding system, fault currents have no safe path to ground, and those current will find unintended paths that could include people. Poor grounding is also a cause of poor power quality....More
The electrical industry spends hours participating in training in order to understand the revisions found in the 2014 NEC that will enhance electrical safety for our community. Electrical code revisions also serve as a significant catalyst that enables investment,...More
Thermal imaging is a proven technology that has enhanced the troubleshooting abilities of electrical and construction professionals. With the incredible advancements in technology and at very affordable prices......More
Our new TVB810 TV Box™ delivers the ultimate in versatility for installing wall-mounted TVs in retrofit projects. There's more room in the box for wires; plus, you can install it horizontally or vertically to ensure proper positioning of low voltage connections behind the TV....More
Arlington’s new non-metallic adjustable mounting brackets are perfect for low voltage installations when the final wall thickness is unknown. Set for a 1/2" thick wall finish, they adjust to accommodate a finished wall up to 1-1/2" thick. Support tabs deliver extra-secure mounting of bracket to wood or steel studs in new constructions....More